Sams Teach Yourself Visual Basic 6 in 24 Hours

By Greg Perry

• Table of Contents
  • Copyright
  • About the Author
  • Acknowledgments
  • Introduction
  • Who Should Read This Book
  • What This Book Will Do for You
  • Can This Book Really Teach Visual Basic in 24 Hours?
  • What You Need
  • Files on the Visual Basic Distribution CD-ROM
  • Conventions Used in This Book
  • Enough! Time Is Ticking!
  • Part I: Introducing Visual Basic
  • Hour 1. Visual Basic at Work
  • Hour 2.Analyzing Visual Basic Programs
  • Hour 3.Controls and Properties
  • Hour 4.Examining Labels, Buttons, and Text Boxes
  • Part II: Coding the Details
  • Hour 5.Putting Code into Visual Basic
  • Hour 6.Message and Input Boxes
  • Hour 7.Making Decisions
  • Hour 8.Visual Basic Looping
    • The Do While Loops
    • The Do Until Loop
    • The Other Do Loops
    • The For Loop
    • Summary
    • Q&A
    • Workshop
  • Part III:Putting Code to Work
  • Hour 9.Combining Code and Controls
  • Hour 10.List Boxes and Data Lists
  • Hour 11.Additional Controls
  • Hour 12.Dialog Box Basics
  • Part IV:Programming with Data
  • Hour 13.Modular Programming
  • Hour 14.Built-In Functions Save Time
  • Hour 15.Visual Basic Database Basics
  • Hour 16.Printing with Visual Basic
  • Part V:Sprucing Up Programs
  • Hour 17.Menus and Visual Basic
  • Hour 18.The Graphic Image Controls
  • Hour 19.Toolbars and More Graphics
  • Hour 20.Writing Correct Applications
  • Part VI:Advancing Visual Basic Applications
  • Hour 21.Visual Basic and ActiveX
  • Hour 22.Object Basics
  • Hour 23.Distributing Your Applications
  • Hour 24.Online Visual Basic
  • Part VII:Appendixes
  • Appendix A.Operator Precedence
  • Appendix B.Answers
  • Appendix C.Using the CD-ROM

Workshop

The quiz questions and exercises are provided for your further understanding. See Appendix B for the answers.

Quiz

1. Why might your program need a loop?
2. How many forms of Do are there?
3. True or false: The Do...Loop While and the Do While are identical in every respect.
4. What is the difference between Do...Loop While and Do...Loop Until?
5. Which loop checks its condition at the top of the loop: Do Until or Do...Loop Until?
6. Why do programmers often use the Val() function on control values and InputBox() returns?
7. True or false: A For loop can count down.
8. How many times does the following loop iterate?

   intI = 10
   do While intI >= 1
   intI = intI - 1
   Loop
   

9. What default Step value does Visual Basic use if you don't supply a Step value?
10. True or false: The Exit statement exits the current application.

Exercises

1. Write a program that contains a text box and a command button. Put a label above the text box that tells the user to type a number from 1 to 10 inside the text box. When the user clicks the command button, check the text box for a valid number and issue an error message box if the number isn't inside the expected range. If the user entered a valid number, use a For loop to issue a beeping sound equal to the number entered in the text box.
2. Rewrite Listing 8.3 so that the error message box that you display tells the user that the age entered is too low if the age is less than 10 or that the age entered is too high if the age is more than 99.

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